package/ci: a comment copypasted from magnum-plugins, what?!

package/ci/appveyor-desktop-gles.bat

@@ -94,8 +94,7 @@ cmake --build . || exit /b
 cmake --build . --target install || exit /b
 cd .. && cd ..
 
-rem Build. BUILD_GL_TESTS is enabled just to be sure, it should not be needed
+rem Build
-rem by any plugin.
 mkdir build && cd build || exit /b
 cmake .. ^
     -DCMAKE_BUILD_TYPE=Release ^

package/ci/appveyor-desktop.bat

@@ -104,8 +104,7 @@ cmake --build . || exit /b
 cmake --build . --target install || exit /b
 cd .. && cd ..
 
-rem Build. BUILD_GL_TESTS is enabled just to be sure, it should not be needed
+rem Build
-rem by any plugin.
 mkdir build && cd build || exit /b
 cmake .. ^
     -DCMAKE_BUILD_TYPE=Release ^